Mobile Phone Repairing PDF Book - Looking for book on mobile phone repairing . Download this PDF book for free to learn mobile phone. In this mobile phone repairing tutorial, I will give you some helpful tips and Download for Free: Mobile Phone Repairing PDF Book; Learn. Mobile Phone Repair and Maintenance Page 2 Acknowledgements This course was drafted An Ethical Guide to Hacking Mobile Phones – By Ankit Fadia.

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Download course Mobile Phone Repair and Maintenance, free PDF ebook Computer PDF guide you and allow you to save on your studies. Mobile Repairing Books - An Ultimate Android Mobile Repairing PDF Book, Get tutorials, techniques, cell phone repairing training Tips. Absolutely Free!. Mobile-Phone-Repairing-PDF Best book of Mobile repairing book. Latest mobile repairing book. New good mobile repairing. Try to learn book.

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Dear Mr. Santos das, I have completed smart phone repair training. In mi 1s while try to switch on it get only vibrates but screen is not wake-up. Some of the components like capacitor and diode near the display connector got burnt while I get the phone from customer. Now what can I do. And one more mi phone is there it has current leak while i check the battery connector when i check using multimeter. How can i solve those issues. Help me thanks in advance. I will suggest to get enrolled in some Institute near your place and learn practically.

Do not rely on Theory. Hello, i reside in nigeria, please could you make a full video tutorial on cell phone repairs especially identification of capacitors, resistors e. Most other videos on YouTube are in hindi.

Just realized your PDF is very helpful, will look through your video collection soon. Thanks for sharing. I am interested in smart phone repairs, help me how to fix them. I want to start as soon as possible. You will have to learn mobile phone repairing. If there is no institute in your local area, then join some online institute and learn with the help of their CDs and other study material.

Remember, Practice make a Man Perfect. I power on the mobile come nokia logo after that white screen come. I like if so much and I am the one who follow repair phone and suply software. But what I want to tray is to make softwaere on myself.

I appreciate the information you shared here on how to repair your mobile phone. I never knew that there were so many different steps to take in order to repair your phone — awesome! Thanks for the information! Dear Sir, I am using rail tracking application in my mobile.

Which has three modes of tracking train. Internet 3. Since updating the cell tower information the application is not working accurately as it was working before updation. Your writing style is awesome, keep up the good work! And you can look our website about proxy list. Where it is saved? Or it if is not saved? How can I delete or edit this new APN. Hello sir. I am not from your country I am Afghan can you please help me for mobile software repairing.

Hello Brother: For software related solutions, you will need few Software Boxes and a Laptop or a Computer. I cannot help online. In this video the internet was connected through proxy server.

I have searched on google play store about this software. But have not found It is possible to connected to internet through proxy server without being detected? It is safe to use it?

If yes? Rest speaker, ringer, mic, vibrator, Touchscreen, display, Combo display, charging connector, handsfree connector, changing strip etc. Dear Sir I would like to know that is there any software for converting 3g to 4g LTE networks or I have to download new handset. Sir I would like to have a follow on this course and very willing to get out of here with knowledge and then would start doing it practical and make it possible and effective.

So sir please give me courage if I can be able to be with you carrying a pen and note book to be my serious lesson and getting out of here beginning a practice job. Pls I need to your provisional advice and measures to tackle sure challengesy. Your pdf file is useful and awesome but plz upload Software problems and solutions, waiting…. PDF is excellent. It contains hardware problems and solution. Similarly can you provide Software Problems and Solutions?

Can you provide information on dongles for different different phones? You have to learn and practice. In short, if you know how to use a multimeter for continuity check, you can easily trace the broken track. I know is very helpful to have tips on phone repair.

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I appreciate this means. Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email. This site uses Akismet to reduce spam. Learn how your comment data is processed. Email Address. April 5, at 4: Santosh Das says: April 5, at April 6, at 1: April 6, at 3: Sushil says: I restored it to factory settings and now when i try to activate it , it keeps asking me for the previous owners apple ID and i don't have his number anymore..

What should i do? Is my iPad pretty much bricked forever? Solution Please try to activate the iPad. If iPad shows this device is linked with abc icloud. If you have the bill of this device.

Just call AppleCare they will assist you better. They will remove this within 3 days. Only if device not been stolen or lost.

AppleCare need only device bill and tell them you are unable to activate the iPad. Problem Can I use a hot plate to remove an S4 digitizer? I'm sure most people here know that heating up an S4 digitizer with a hairdryer and removing it that way can be quite a chore. I'm just wondering if anyone has ever used a hot plate to do this instead? Is it a good idea? If so what temperature do I set it to without damaging the S4? Solution Yes, set it to 65C, 5 minutes on each side leave the S4 on the hot plate while taking it off.

By unplugging the logic board you effectively did a hard reset. And also try completely disconnecting the logic board and reinstalling it. The digitizer flex cable seems to be tightly in.

Solution It sounds like you might have a hardware or a software issue, try to open up the device and make sure all cables are on correctly by removing and reinserting. It May also be a ribbon connector issue. To assemble is to fit together all the separate pieces in order to form one whole.

Before you continue reading, complete the following activity. Activity 5: Disassembling a mobile phone 5 minutes. What steps would you follow when disassembling a mobile phone? Write them down in the space provided below 1. Page 19 Mobile Phone Repair and Maintenance Disassembling a Mobile Phone The following are the steps that you should take when disassembling a mobile phone: 1.

Switch off the phone 2. Remove the battery cover 3. Remove the battery, SIM card memory card if any 4. Remove all the screws from the phone 5. Lift back the cover with the help of a flat screwdriver 6. Remove the strips buzzer strip, display, camera, volume and speaker button strips 7. Remove the antennae wire from the outside 8. Remove the motherboard and vibrator. To successfully disassemble a phone, you need to understand the various internal sections of a mobile phone and how they are connected to the CPU.

Let us look at that next. Internal Parts of a Mobile Phone Table 3 below outlines the main sections and how they are connected. In most phones the micro SD card holder is Memory card section connected through a 8-pin socket.

The memory card section is found inside the CPU In modern mobile cell phones which have a separate ear speaker, the speaker is directly connected to the CPU. Some mobile phones have audio IC in the audio section, while others have audio amplifier. LCD Backlight in mobile cell phones is made according to the series circuit.

Positive power supply is given to this section directly from the positive end of the battery. Charger and system interface connector is made together in most modern mobile cell phones.

Regulator section is made separately for the Battery Charging Section battery charging section. In some mobile phones, the battery charging section is made inside the Power IC. The hands free jack, hands free MIC, speaker signal component and hands free audio amplifier are Hands free Earphone Section: present in this section.

Hands free symbol is displayed after connecting the Hands free jack. Page 21 Mobile Phone Repair and Maintenance Assembling a Mobile Phone The following are the steps that you should take when assembling a mobile phone: 1.

Fix the vibrator strips of speaker and volume button 2. Fix the motherboard 3. Connect the antenna with wire 4. Place the camera and connect it 5. Place the buzzer 6. Put the camera cover 7. Make sure that the LCD is working before you place the screen 8.

Put battery and battery cover So far you have learnt about the hazards of mobile phone repair, the parts of a mobile phone, the tools to use and how to assemble and disassemble a mobile phone. Now let us look at how to diagnose and repair a mobile phone. Let us start by looking at the skills that you need to have to be able to diagnose and repair a mobile phone. Skills Needed to Diagnose and Repair a Mobile Phone Before you can diagnose and repair a phone, there are some skills that you need to learn.

Soldering Soldering is a process in which two or more metal items are joined together by melting and flowing a filler metal into the joint.

The filler metal has a relatively lower melting point. Plug and pre-heat the soldering iron. Heat both items at the same time by applying the soldering iron to the copper pad and the component lead. Continue heating and apply a few millimeters of solder.

Remove the iron and allow the solder joint to cool naturally. It only takes a second or two to make the perfect joint, which should appear shiny. Desoldering Desoldering is the removal of solder and components from a printed circuit board for troubleshooting, repair, replacement, and salvage.

Figure Desoldering Steps in desoldering 1. Use a solder wick finely braided copper to wick away excess solder from a de- soldered connection. Apply the solder wick and use the soldering iron to the de-soldered connection.

The solder wick will draw the excess solder off the PCB pad. Testing a phone using a multimeter We hope you still remember that a multimeter is a device that is used to measure the voltage, current and resistance of various components of a mobile phone.

Plug your red and black probes into the appropriate sockets on your multimeter. Hold the probes against the resistor. Check the resistor value on the display. Figure Using a Multimeter Take Note: Always turn off the power supply to your circuit before measuring resistance. To measure voltage you should follow these steps: 1. Plug the black test probe into the COM input jack. Plug the red test probe into the V input jack.

If the DMM has a manual range only, select the highest range so as not to overload the input. Page 25 Mobile Phone Repair and Maintenance 4. Touch the circuit with the tips of the probes 5. Read the number in the display window and take note of the unit of measurement.

Turn off power to the circuit. Cut or unsolder the circuit, creating a place where the meter probes can be inserted.

Plug the red test probe into the amp or milliamp input jack, depending on the expected value of the reading. Connect the probe tips to the circuit across the break so that all current will flow through the DMM a series connection.

Turn the circuit power back on. Jumper setting Jumpering means to temporarily complete a circuit or to bypass a break in a circuit by making a connection from one point to another. A good conductor wire is used to make a jumper which by-passes the components and passes on a signal or supply line for further uses. When wire is used as a jumper, it must have some special specifications as required.

These jumper wires can mainly be of two types i. In the mobile phone insulated wires are used for jumpers. The length of a jumper depends on the two points connected in between. Why do Jumpering While repairing mobile phones, we find that certain faulty components are very difficult to get from the market. To repair such mobile phones the only immediate option is the use of jumpers.

By use of jumpers we will bypass the faulty components specifically. How to Jumper 1. Disassemble mobile phone and place it on a PCB holder. Using a multimeter, check track and find the fault or the missing track that need jumper. Apply liquid soldering flux to the points where you need to solder jumper wire.

Cut jumper wire to desired length and remove its lamination using blade cutter.

Hold one end of the jumper wire and solder it to one point of the faulty circuit track. Use a good quality tweezers to hold the wire and good quality of soldering iron and solder wire to solder. Now hold the other end of the jumper wire and solder to the other point of the track 7. Using a multimeter check the jumper. Page 26 Mobile Phone Repair and Maintenance The Figure 31 Below shows jumper settings in of the jumpers may look like on your motherboard.

In this example, the jumper is the white block covering two of the three gold pins. Also, next to the pins is a silkscreen description of what the pins do, in this case when pins are jumped the computer is operating normal, when are jumped it is set into configuration mode, and when open the computer will be in recovery mode. Figure Jumper Setting You now know the skills that you need in order to diagnose and repair a mobile phone. Let us now learn how to diagnose and repair mobile phones.

Mobile Phone Diagnosis There are two methods that you can use to find out faulty or damaged components in a mobile phone. During cold testing do not power the phone from any equipment. Use the diode range and beep sound from the multimeter to find fault in the mobile phone. During the fault-finding and repairing process of each part, component or section, you should receive the following correct values: 1. Battery Connector Tip Sense : above. Display Connector Supply Pins:.

Display Connector Signal Pins:. Camera Connector Supply Pins:. Camera Connector Signal Pins:.

Key Tip Row and Column :. Charger Connector Tip:.


Vibrator Motor Connector:. Micro Card Connector Pin 1,2,3,5,7, The fault is found by powering the mobile phone with a battery which has a DC power supply. During hot testing, the voltage of different part or sections should be as follows all values in Volt : 1. Display Connector Supply Pins: 1. Display Connector Signal Pins when working:. Camera Connector Supply Pins: 1. Camera Connector Signal Pins when working:.

Charger Connector Tip: 5 to 6 Vibrator Motor Connector Tip when Working: 1. Micro Card Connector Pin 1,2,3,5,7,8: 0 to 2.

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The following statements describe either the cold testing or hot testing methods used for diagnosing mobile phone problems. Write the correct diagnosis method against the statement that best describes it. Description of diagnosis method Name of Diagnosis method 1. Checks the value of resistance using a multimeter to diagnose a problem 2. Checks the voltage of damaged part by giving power to the mobile phone using a batter of DC power.

The phone is not powered during testing 4. Fault is found by powering the mobile phone with a battery Compare your answer with what you read in the following section. You now know how to diagnose a fault in a mobile phone using the hot and cold testing method. In the next section we shall learn about the common mobile phone faults. A fault is a defect a failure in a circuit or an electronic device. What causes faults or failures in mobile phones?

Solutions to Battery charging faults 1. Change the charger and check. The voltage must be between 5 and 7 Volts. Clean, resold or change the charger Connector. If the problem is not solved then change the battery and check again 5.

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Check the voltage of the battery connector using a Multimeter. The voltage should be between 1. If there is no voltage in the connector check the track of the charging section. Refer to the diagram of the particular model of the mobile phone.

If the problem still persists, check the fuse, coil and regulator one by one and change the faulty part.

If the problem is still not solved then heat or change the charging IC. Finally heat, re-ball or change the Power IC. Check the battery connector and charger plug to see if there is any problem. Check if there is any dust or corrosion in the connector or any broken pin.

Clean the points using IPA or cleaning swabs. Check the Interface Connector to see if there is any dust. If there is dust clean or replace the interface connector.

If the battery problem is not solved then upgrade the software or operating system to latest version 5. Check for any short circuit. If there is serious problem at the board level then it is better to replace the whole Logic Board of the Mobile Cell Phone.

Solutions to Network fault 1.Work: It filters frequency during incoming calls. June 25, at Hardware of Mobile Phone. Adnan Wazir says: Index 1.

Change LED or Jumper. If the problem is still not solved then there is Shorting in the PCB that needs to be checked by some technician. Figure Desoldering Steps in desoldering 1. To Boost Ultrasonic Cleaner:

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